Fitbit Flex Band, GMYLE Replacement Silicon Wrist Band Bracelet with Clasp for Fitbit Flex Activity and Sleep Tracker (Large) (Purple) Choose your own style, personalize your wristband with GMYLE Fitbit wrist band collection. Made with durable silicon. Not easily fade in color or change shape over time. Free size wristband accessory, your perfect replacement wrist band for Fitbit Flex. A worth trusting name: GMYLE. Stylish yet protective for your Fitbit flex. 12 Months worry-free warranty provided by GMYLE